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Topic Review (Newest First)

09-02-2005 11:26 AM

SmallBlock_guy

Remembering is hard!

If I remember correctly the speed density system use the EGR as a trigger for a different spark (and possibily fuel table). If you leave the EGR connected but plugged, when it tries to turn it on it will go to a separate ERG on spark table. If it was me I would run it if possible ('cuz it may be easier).
If I was going to unplug it, I would turn off the circuit fault and disable EGR in the cal. If I just unplugged it I could also live with the fault. It may not send you in to open loop (it really should not being OBD I).

If it ain't broke . . .

09-02-2005 10:55 AM

Robinson Robin

I agree, there really isn't a good reason to remove the egr on a near stock vehical and alot of good reasons to keep it.

09-01-2005 07:55 PM

4 Jaw Chuck

Unless you completely remove the computer and fuel injection system I would keep it, every car I tried removing the EGR on that was fuel injected and run by a computer ran worse. The EGR is now an essential part of the total engine package on all newer cars and should be left as is, try just blocking the vacuum port running to it and see the reaction. Usually the mileage takes a big hit with no extra power to compensate and it runs poorly at part throttle.

09-01-2005 07:44 PM

BigDawgsEatFirst

California wants to send a message to have cars less than a couple of years old.
I drove a Tractor-Trailer for years and
out of 49 states
California gives you the most problems(Emissions,Weight,Log Books ,Length)
like was said (By several seasoned chevy rodders)
if he has a ECM and fuel injection(TBI orTPI)
run a EGR
there is no need
to read into question
Period.

09-01-2005 06:45 PM

Triaged

Quote:

Originally Posted by h8louzn

Not true!!
In CA your car is exempt if it is a 75 or older.....
Just checked into this again as I was going to help my nephew with a 76 mustang II Pro street...

OK, I typed to fast...
That is true but, you do not have to smog the car if it's a 75 or older..
So why would you worry about any of the requirement for that year car??
If you want to keep all that early smog crap on your car go ahead I will toss mine as it will never see a smog shop again!

I have a friend that got pulled over by the EPA and given a smog check on the side of the road in a '72 K5 Blazer. Just because you don't have to get a smog check doesn't mean you are exempt from any of the smog laws.

Not true!!
In CA your car is exempt if it is a 75 or older.....
Just checked into this again as I was going to help my nephew with a 76 mustang II Pro street...

OK, I typed to fast...
That is true but, you do not have to smog the car if it's a 75 or older..
So why would you worry about any of the requirement for that year car??
If you want to keep all that early smog crap on your car go ahead I will toss mine as it will never see a smog shop again!

08-31-2005 11:09 PM

Siggy_Freud

[QUOTE=Jacks77]

Quote:

Originally Posted by Triaged

1) Because it does nothing to hurt power outputOkay

2) Because the computer will throw a code if you remove itWell, my 77 don't have a computer

3) Because it is against federal law (and in many places state law as well) to remove it.Wrong! Depends on which state and how old your car is. Mine is 28 years and exempt.

4) Because it will help reduce NOx emissions making the air we all have to breath a bit better.Well then, that's gonna wipe out 3/4 of the hot rods on this board that don't run the EGR...

This thread was meant to help the original poster of the question thus information posted should be relevant for his vehicle first and foremost. The things said so far are all true and great advice. While some advice may not apply to your car Jacks its great that all of it has been posted.

08-31-2005 10:09 PM

sbchevfreak

Also prevents part throttle detonation at cruise speeds.

08-31-2005 10:07 PM

Triaged

Quote:

Originally Posted by Jacks77

3) Wrong! Depends on which state and how old your car is. Mine is 28 years and exempt.

2) Because the computer will throw a code if you remove itWell, my 77 don't have a computer

3) Because it is against federal law (and in many places state law as well) to remove it.Wrong! Depends on which state and how old your car is. Mine is 28 years and exempt.

4) Because it will help reduce NOx emissions making the air we all have to breath a bit better.Well then, that's gonna wipe out 3/4 of the hot rods on this board that don't run the EGR...

08-31-2005 08:03 PM

BigDawgsEatFirst

Quote:

Originally Posted by Bill Yarbrough

86 TPI 350 out a Corvette, completly stock going in an old Chevy. Do I want to use the EGR? The car is driven 20,000+ miles a year. What about performance and gas milage? Emissions are not a factor.

we were taught in school to push in the diaphragm on EGR (On Chebbie)
and if working the motor would stumble(Running at Idle)
like unpluging a vacuum port
if you got fuel inject and ecm hooked up
leave it alone
find better gas and power somewhere else
Like earlier posts stated
they are 100% right
make sure it works

08-31-2005 07:48 PM

WildBill

Leave it in!

The EGR allows exhaust gas into the cylinder during the intake stroke and, amazingly and counterintuitively, LOWERS cylinder temperature. THis lowers emissions and, when operating correctly as it almost always does with fuel injection, makes more power at part throttle, basically all the time, for tha amount of gas consumed by keeping the A/F ratio close to ideal. Leave it in.

08-31-2005 04:41 PM

Siggy_Freud

Whatever you decide to do, make sure the chip "knows" what is going on. It has EGR dependent features. When all is said and done its almost easier to keep it.

08-31-2005 02:51 PM

Triaged

Quote:

Originally Posted by Jacks77

... if there is no effect, then why use it at all?

1) Because it does nothing to hurt power output
2) Because the computer will throw a code if you remove it
3) Because it is against federal law (and in many places state law as well) to remove it.
4) Because it will help reduce NOx emissions making the air we all have to breath a bit better.

08-31-2005 01:04 PM

Jacks77

From reading the above, if there is no effect, then why use it at all? Just more junk on the engine. I blocked mine with an alumn plate.

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